Power loom



June 3, 1 1- Q c. P. BERGSTROM ET AL 1,811,705

POWER LOOM Filed Jan. 15, 1929 4 Sheets-Sheet 1 c. P. BERGSTROM ET AL 4 Sheets-Sheet 2 POWER LOOM Filed Jan. 1929 June 23. 1931.

Cor/ P 515 x900; C (lb/$0 l/kayre/z June 23, 1931. c. P. BERGSTROM ET AL POWER LOOM Filed Jan. 1 1929 4 Sheets-Sheet 3 I Z n I III/lI/IIIIA m W Z Z V 1? f a J 3, 1931- C3. P. BERGSTROM ET AL 1,811,705

POWER LOOM Filed Jan. 15. 1929 4 Sheets-Sheet 4 Patented June 23, 1931 S'T'A'IiEfSfPATENT" OFFICE.

mini, 2. nnneswnonr, on ILL nnY; mnssncnusncr'r s, m) onnn J, 'LINDEGRENL on PROVIDENCE, nnonn rsLAnn,, n s sIe ons TO CROMBTON & nownns LOQML WORKS, on WORCESTERMASSAQHUSEITS, A CORPORATION on MASSACHUSETTS POWER LOOM Applicationflled January--15, 1929. Serial 110,332,691.

- This inventionrelates to .a power loom on, which; usual Weaving operations may be performed-v.

It is: the general object of our inyent'ionto improve the. ,constructionof such a loom and particularly to improve the frame. construction thereof, to the .end that the, loom maybe more conveniently and economically manufactured, and that the cost. 1 of repairs and replacements therein may be greatly reduced. r

To the. attainment of thisgeneral' object, we-haveprovided aloorn frame embodying important novel features of. construction, by which the assembly of, various loom attach ments therewith is much-facilitated and by p Which hand fittingin assembling is substan: tially eliminated.

Our new-construction also renders possis ble the provision of. more adequate, bearing surfacesv for the different loom. attachments, renders possible the convenient and accurate grinding or machining of suchsurfaces, and provides increased,accessibility for, tl16 fitr tachments and the fastenings therefor.

' Our invention further relates: to arrange-v ments and combinations-of pants whichiwvill be hereinafter described and more particularlypointed outwin the appendedclaims,

A, preferred, form of the invention is shown. inethe drawings in which;

l5ig. '1 is-,:a side elevation :of a loom embodying; our improvements;

Fig, 2 isa front elevationithereof;

Fig. 3 is aside elevationof one of the loom sides, looking in the direction: of thearrow 3 in Fig; 2;

Fig. 1 is a sectional view. of certaimparts, taken along the line in Fig 1;

Fig.5 is a detail sectional planvview, taken along the line .5.5 in Fig.;2

Fig. 6 is; ade tail sectional front elevation",

taken along the line 66 -in1Fi-g. 5;;

Fig. 7 is an enlarged detail plan view, looking in the direction ofthe arm-W 7 in Fig. 1; r V ii Fig.8 is an enlarged detailsectional plan view, taken along the. line 8 -8inFig. 1;

Fig.9 is a detail sectional. elevation, taken along the line 9- -9- .in' Fig 8 5;

Fig-10 is a detail side elevationof-certain parts, looking in the directionof the arrow usual picker sticks 16, actuated bypick-cams 17 on the usual-bottom or cam shaft. 18. The cams 17 engage pick balls or rolls 20, mount: ed on arms 21 on pick shafts 22, said shafts having pickarms 23. fast: thereonand *con' nected ,Withthepicker sticks '16 bythe usual. lug strap connections 25;.

Inner frame membersBO and, 31 provide supports for the take-up and'cloth rolls; and for the; gearing to actuate said. rolls. The

upper portions 025 the, loom sides 10"are com nected by one or more arched members 35:, onvvhich the usual :harness motion may be mounted.

Pattern controlled mechanism 40: of; a usual type is shown as driven by spiral gears 41 from-the upper or crankshaft 42, and con? trols the vertical movements of. the drop boxes- 15. A- weft carrier magazine. 45.. is

'mountedon one of theloom sides 10 andzis xbitaceol to the arch 35,;

. The various loom. attachments above mentloned are or may be. in general. of'the usual type and inthemselves form no part ref-our present invention which relates moreparticularly to changesand improvements in the. construction of the loom frame, by

which improvements the. assembly of these and other attachments on the. loomframe is greatly facilitated.

Referringjparticnlarly to. Figs. Sand 4, it will beseen that the loom sides: 10 are formed Wlth strengthening-ribs 50 of substantial depth on their inner faces, .but that as indicated in Fig. 11.

the outer faces of tie loom sides are flat and smooth, except for the very slight projection of the bearing surfaces or footings 52 formed thereon. These surfaces 59. project beyond the outer faces of the loom sides 10 just enough to permit the grinding or machining of these surfaces in an exact and established plane, without unnecessarily grinding or cutting away the remaining portions of the outer surfaces of the loom sides 10.

A limited number of bearing surfaces are also required on the inner faces-of the loom sides, particularly to provide footings for the cross girts and arch members. For this purpose we provide inner bearing portions which bridge across between certain adjacent ribs on the loom sides and which are substantially aligned with the tops of said ribs.

It is desirable that the thickness of metal throughout the loom sides should be kept as nearly uniform as possible, in order that equal and uniform cooling of all parts of the loom side may be attained. Accordingly we have provided cored openings between the inner and outer bearing surfaces, as indicated particularly in Figs. 8 to 13.

In Figs. 8 and 9, we have shown the construction at the point 'where the front girt 11 is secured to the loom side 10. An inner bearing portion is provided on the loom side, spaced from the corresponding outer bearing surface 61 by a cored opening 62, so that the thickness of metal is substantially uniform at both faces of the loom side.

A bolt 63 extends through each plate 61 which is abutted and welded rigidly to each end of the L-shaped cross girt 11. In order to resist the compressive strain of the bolt and also in order to hold the portions 60 and 61 rigidly spaced during finishing opera tions, we provide an annular ire-enforcement 65 surrounding the bolt 63 and acting as a brace between the inner bearing portion 60 and the outer bearing portion 61. An opening 66 is provided below the inner bearing portion 60 for convenience in setting the core and in removing the core sand.

In Figs. 10 and 11, we have shown a similar cored construction by which the lower ends of the arch 35 may be firmly secured to the outer faces of the looin'side. It is desirable that the arch be adjustable forward or rearward in accordance with the number of harnesses in use, and for this purpose we have provided an elongated slot 70 (Fig. 10) surrounded by a reenforcement or brace 71 of corresponding section, 7 The loom sides are thus strongly re-enforced at the points where the arch 35 is secured thereto and a firm and rigid construction attained, while at the same time a forward and rear ward adjustment is made possible.

In Figs. 12 and 13, We have shown the manner of securing the rear cross girt 12 to the loom side 10. An inner bearing surface 75 is provided, spaced from the corresponding outer bearing surface 76 by a cored opening 77 in which annular re-enforce ments 78 are provided, surrounding the girtsecuring bolts 80. The girts 12 are preferably formed of channel iron body members, having plates 81 abutted and welded to the ends thereof for attachment to the loom sides.

The plates 81 are of L-shaped section as shown in Fig. 12' with a flange 82 thereof secured to the edges of the rearwardly ex tending flanges of the channel beam 12. The plates 81 also extend above and below the beam 12 as shown in Fig. 13, so that the bolts may be readily inserted. The nuts for the bolts 80 are on the open flat outer faces of the loom sides 10 where a wrench may be conveniently applied thereto.

In Fig. 14, we have shown the manner of attaching the magazine to to the loom side 10. The magazine 45 is secured to a bracket and the upright portion of the bracket is bolted to the outer face of the loom side 10'. The breast beam 13 is fixed to the loom side 10 by a bolt or screw 91 and is held from turning by the ribs 50 between certain of which the breast beam is seated. The horizontal partof the bracket 90 is secured to the breast beam 13 by a bolt 92. The several parts are thus very securel tied together and the magazine is firmly supported.

In order to provide ample footings for the loom, while maintaining the overall thickness of the loom side uniform, we provide lateral extensions 95 on the feet of the loom sides, to which foot plates 96 are so cured by screws 97. The plates 96 may be secured to the floor by lag screws 98, as usual.

By reason of the fact that the outer face of each loom sideis entirely unobstructed by ribs or projections, it is possible to make the bearing surfaces 52 of ample size, so that the various attachments bolted thereon may have enlarged footings and may be more firmly seated and supported than has been heretofore possible.

We have also redesigned and reassembled the various loom attachments in such manner that to a very large extent they are bolted directly to the outer faces of the loom sides, thus making them more convenient for attachment or removal, and particularly causing the nuts or screws by which they are secured to be readily accessible from the out side of the loom, thus doing away very largely with the necessity for repair or replacement operations under the loom or in such position that the warp or fabric will be soiled or broken by the loom fixer;

In such looms, it is common to construct the breast beam 13, of wood, and diffi'culty has been sometimes encountered in prevent-- ing surfaces or footings 52 on the loom sides 7 ing such wood breast beams from becoming loosened when in use. In our improved construction, we arrange certain portions of the ribs 50 to provide extra deep pockets for the ends of the breast beam 18, as indicated most clearly in Figs. 5 and 6. These pock-' ets embrace the breast beam on three sides thereof and effectively prevent looseness or displacement thereof, while permitting convenient removal rearward.

In Fig. 7 we have shown an adjustable device by which the'magazine 45 may be firmly braced against the arch 35. in any adjusted position of the arch. Both coarse and fine adjustment is provided by this device, which is not claimed herein but forms the subject matter of a copending application Serial No. 330,632 filed January 5, 1929.

In Figs. 2 and twe have indicated thebearing blocks of the pick shafts 22 as being secured to bearing surfaces or footings on the smooth outer face of the loom side, with the pick arms 21 extending through openings in the loom side.

The provision of accurately finished bearenables us to do away with most of the hand fitting previously necessary in the assembling of looms, and enables us to provide duplicate parts which may be readily removed and replaced when occasion arises. Heretofore the outer face of each loom side has been provided with raised ribs, preventing practical and economical finishing operations thereon, and the various attachments have commonly been fitted by hand,

structed on its outer face and having spaced finished bearing surfaces thereon, each loom side being provided with aplurality of relatively deep stiffening ribs on its inner face and with inner cored bearing portions supported by said ribs, and cross frame members having their ends abutting said inner bearing portions and firmly secured to said loom sides. j

2. In a loom, a loom frame comprising loom sides each substantially fiat and unobstructed on its outer face and having spaced finishing bearing surfaces thereon and each loom side being provided with relatively deep ribs on its inner face and with integral inner bearing portions bridging the space between two of said ribs and substantially aligned with the tops of said ribs, and cross frame members having their ends firmly secured to saidinner bearing portions.

3. The combination in a loom as set forth in claim 2, in which said inner bearing por tions are provided with bolt openings and with substantial integral re-enforcements thereforv disposed about said openings and bracing the inner and outer bearing portions apart.

4. In a weftreplenishing loom, a loom frame comprising loom sides, each substantially fiat and unobstructed on its outer face and provided with finished bearing surfaces spaced apart in a single plane thereon, a breast beam member secured to and located between the sides and assisting in holding said 'sides in spaced parallel relation, a bracket capable of supporting a weft magazine and having bearing surfaces disposed perpendicular to each other, one of said surfaces'being bolted to the breast beam, said bracket actingto hold the loom side and breast beam'together.

In testimony whereof we have hereunto aflixed our signatures.

' VCARL P. BERGSTROM.

I CARL J. LINDEGREN.

attachments on said bearing surfaces and on i the outside of the loom, we have not only reduced the cost of manufacture by av large and substantial amount, but we have also increased the accuracy of the work, and have reduced the labor of the loom fixer to such an extent that the number of looms cared for by each loom fixer may be substantially increased.

Having thus described our invention and the advantages thereof, we do not wish to be limited to the details herein disclosed,

otherwise than as set forth in the claims,

but what we claim is: g V

1. In a loom, a loom frame comprising loom sides each substantially flat and unob- 

